Notorious Help! Unusual noise while driving…

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Craig A.

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Arrma RC's
  1. Notorious
  2. Senton 3s
while driving there is a pronounced ticking. Cannot replicate on the bench. I have visually inspected all diffs (front diff case was broke). Otherwise nothing abnormal. What could it be???
 
When you said the front diff case broken. Did you check the input gear and the diff gear? Even the smallest chip in the gears can make it sound different..
No! But I will pull it after dinner…
 
When you said the front diff case broken. Did you check the input gear and the diff gear? Even the smallest chip in the gears can make it sound different..
Pulled both pinions.. nothin! 😔
 
^^^ Agree
Run it, have fun, the problem may surface and become more apparent to you later.
Seems like a shimming or backlash issue though. A ticking/clicking sound is usually a skipping Main/Input gear. (F or R)
Usually heard under load or hard braking. It could be intermittent at times.
Sometimes a bulkhead replacement is the remedy along with a new gear set, if they got worn beyond use. Always replace gears in sets.
Worn Input gear BB's can contribute to this issue also. Check them closely.
 
^^^ Agree
Run it, have fun, the problem may surface and become more apparent to you later.
Seems like a shimming or backlash issue though. A ticking/clicking sound is usually a skipping Main/Input gear. (F or R)
Usually heard under load or hard braking. It could be intermittent at times.
Sometimes a bulkhead replacement is the remedy along with a new gear set, if they got worn beyond use. Always replace gears in sets.
Worn Input gear BB's can contribute to this issue also. Check them closely.
Thanks for the tips! Gonna let er rip!
 
Whelp… finally got to run er again… tick got louder and narrowed down to rear diff.. I got a little OCD and had to rip her apart again and found 4 teeth on the diff gear that are not like the rest…
 
Yeah you need a main gear and input gear set. Need a fresh set. Time to rebuild the whole diff if you have some mileage on it. You are in there already. At least top off the diff oil while you are there. Check the 2 BB's at the Input gear also. Replace them or clean and lube them. Drop of oil. They probably got abused in the process. Often overlooked. Check them first by rocking the input cup as attached to the input gear. Side play will mean they are toast. Been there many times.
:cool:
 
Last edited:
Yeah you need a main gear and input gear set. Need a fresh set. Time to rebuild the whole diff if you have some mileage on it. You are in there already. At least top off the diff oil while you are there. Check the 2 BB's at the Input gear also. Replace them or clean and lube them. Drop of oil. They probably got abused in the process. Often overlooked. Check them first by rocking the input cup as attached to the input gear. Side play will mean they are toast. Been there many times.
:cool:
Just got both gears and a diff kit.
 
Have any diff oil on hand? also?;)
 
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